Add a new break within a measure in Breaks & Spacers Palette
Sometimes a measure is just too long to fit in the space between the page margins. It would be very useful to have a new type of system break that could be inserted anywhere within a measure. The first part of the measure would end without a bar at the place where the break has been inserted. As a preference, two short diagonal lines mid-stave at the end could be inserted or not. The measure number on the second part should be in parenthesis.
Note 1: See discussion here: https://musescore.org/en/comment/943256
Note 2: The documentation should strongly encourage to use this break only if strictly necessary and at whole beats